Tides of Vengeance is Battle for Azeroth’s first major content patch, scheduled to enter the test cycle later this week. Tides of Vengeance expands on the story started on Battle for Azeroth launch, with the addition of Incursions, a new Warfront, two new Raids, Heritage Armor for non-allied races, and much more! – WoWhead

Story-driven Content

While Battle for Azeroth expanded mostly the stories from Jaina and Talanji, Tides of Vengeance will focus on different characters, along with an expanded War Campaign, new World Quests and Incursions.

War Campaign

Tides of Vengeance will continue the storylines from Battle for Azeroth’s launch, including an expanded War Campaign, now affecting the enemy faction more, as we press our war efforts. In order to participate in this, players will likely need to complete the current War Campaign, to learn more check our Alliance War Campaign and Horde War Campaign guides.

Incursions

With the increased attacks, we will now have Incursions, which will work similar to Legion’s Invasions, but now done by the opposite faction’s forces. Leveling characters are able to participate as well, as long as one character from the account has unlocked World Quests.